Lost Diseqc in Echostar 3000ip

Llew

cerca trova...
Staff member
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My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
The Flatlands of East Anglia
#1
The 22kHz switching has gone bye-bye in my Echostar AD3000ip :-doh!

Both port and band control are inactive, which suggests the 22kHz oscillator has ceased to function.

I'm not sure if it's hidden in one of the ic's or a discrete component. Before I get the 'scope to work on it, does anybody know where the relevant circuitry might be located?

Cheers

Llew
 

Channel Hopper

Suffering fools, so you don't have to.
Staff member
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25,463
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My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
#2
Ive got a customer using the 3000 on both motorised (from 42E to 5W) and then a DiSEqC switch for 30W .

He is always having to switch between the various DiSEqC functions to get the switch to work.

I doubt your problem is down to the 22kHz oscillator, you would have trouble with the tone switch to high band otherwise.

Try resetting the machine, or even a later firmware upgrade first.
 

Llew

cerca trova...
Staff member
Messages
14,484
Likes
3,416
My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
The Flatlands of East Anglia
#3
Well I took the box out of commission and checked with the scope for the switching train on high band at the LNB socket, lo and behold there it was.

I was concerned that, unlike another receiver I tried, there was a modulating waveform of 27mHz (that's the STB's crystal frequency) superimposed on the 22kHz signal, but at least the proper Diseqc pulses were flying out.

Stuck the set back and tried it again, and everything is OK now.

Llew
 
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My Satellite Setup
turnkey 700mhz athelon .5gb ram,120 gb,drive
j-test j-tag setup
#4
diseqc on sti chips is controled via i2c to the tuner block,this is where the
22khz is pll generated.registers in the tuner control the pwm diseqc.
if you want more info,let me know, will help any way i can.
'boxnut'
 

Llew

cerca trova...
Staff member
Messages
14,484
Likes
3,416
My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
The Flatlands of East Anglia
#5
Thanks, but sorted now. BTW,the AD3000 uses an IBM PowerPC, not an STi.

Llew
 
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